Calendar integration, build or buy?
Trusted by 450+ SaaS products
Build
Building calendar integration. What lurks beneath the surface?
Calendar sync is the part you can see. Beneath it you inherit provider downtime, availability logic, the time zone and daylight saving edge cases that surface long after launch, and conferencing links that have to survive a reschedule. Deeper still, calendar data is personal data, so holding it pulls in GDPR, HIPAA, SOC 2 and rules about where that data is allowed to live.
What starts as a simple feature becomes a major build, and then it stays. Shipping takes six to nine months, and teams running their own layer spend 42% of ongoing engineering time keeping it working. AI can compress the build, but not the 42%.
Buy
Cronofy. Calendar integration challenges solved.
Developers can skip the build and integrate Cronofy to take all of the "below the surface" complexities off their plates.
Underneath every Cronofy capability is what we call our Temporal Grid. It absorbs everything you would otherwise have to build and maintain every time a provider pushes an update. Integrate with Cronofy once, and all of that complexity disappears.
Reliability
Calendar integrations that don't break
Calendar APIs fail and providers have outages. Cronofy's sync engine absorbs both, caching real-time availability so users can still book when a provider goes dark.
A 99.99% uptime SLA and built-in failover mean your team ships features instead of chasing calendar bugs.
Speed
Support that gets you to production, fast
Weeks disappear into provider documentation, custom logic and edge cases before anything ships.
With Cronofy a dedicated technical advisor works with you from day one, mapping the integration and steering you past the expensive mistakes.
Performance
Booking experiences your users expect
Build it yourself and every availability check fans out into separate calls to each provider, while the user waits.
With Cronofy a single API call returns real-time availability across every connected calendar, so booking feels instant.
Availability
Complex logic you don't need to handle
Availability logic is where a DIY build gets messy. Working hours, buffers, interviewer limits and multi-person bookings all need rules, and every one of them is somewhere to get it wrong.
You define the rules and the API applies them, whether it's a one-to-one or a full panel.
Time zones
Time zone handling that doesn't break your flow
Daylight saving shifts, recurring events and automatic detection turn simple scheduling into a stream of edge cases, and they surface long after launch.
Cronofy's API normalizes time zones behind the scenes, so users see accurate availability wherever they are and whatever time of year it is.
Compliance
Compliance that keeps your users' data secure
Calendar data is personal data, so building the integration yourself puts compliance on your team.
Cronofy is GDPR, HIPAA and SOC 2 compliant, and ISO 27001, 27701 and 27018 certified, with data hosted in six regions so customer data stays in its jurisdiction.
Book your calendar integration demo
After submitting the form, you'll be able to book time with a member of our team.
In a 30 minute call you'll get:
- A demo mapped to what you're building
- An overview of how the integration works
- Answers to technical and commercial questions